diff --git a/checkin_notes b/checkin_notes
index 3f067526d1..500d5a3c66 100644
--- a/checkin_notes
+++ b/checkin_notes
@@ -4407,3 +4407,8 @@ Eric	May 27 2008
     zip/
         Makefile.am
 
+Eric	May 27 2008
+    - configure:
+        added LIBBOINC_VERSION definition for libtool use.
+
+    configure.ac
diff --git a/configure.ac b/configure.ac
index b4e11611ac..cc5c534d76 100644
--- a/configure.ac
+++ b/configure.ac
@@ -10,6 +10,9 @@ AC_PREREQ(2.57)
 
 dnl Set the BOINC version here.  You can also use the set-version script.
 AC_INIT(BOINC, 6.3.2)
+LIBBOINC_VERSION=`echo ${PACKAGE_VERSION} | sed 's/\./:/g'`
+AC_SUBST([LIBBOINC_VERSION])
+
 
 AC_ARG_ENABLE(debug, 
     AS_HELP_STRING([--enable-debug],